Ronald Harvey, 53, and Vickie Brandkamp, 54, both of Green Ridge, Mo., were killed when an unknown driver rear-ended their vehicle, causing it to overturn and hit a tree on U.S. Highway 50.

Two other people in the car were taken to hospitals with serious injuries, including Kelly Neth. She wants to know who the person was who hit the car and left the scene.

"Please, please, please turn yourself in," she said from her hospital bed.

She said the four people in the car were returning from the Rockfest concert in Kansas City late Saturday.

She said she can barely believe Brandkamp and Harvey are gone.

"It was real heavy," she said. "It was a really heavy feeling on me. I don't think it's even hit me all the way yet."

She said she doesn't remember a great deal about the crash except the moment where she realized Harvey might have died. She said she also can remember the damage to the car and hearing Brandkamp call out for help.

Neth said she hopes the other driver realizes what he or she has done.

"Two people died. They've got families and grandbabies that's going to miss them terribly. You won't be able to live with yourself. I couldn't live with myself hitting and running like that," she said.

She said she was asleep in the back seat when the car was hit, so she never got a look at the other vehicle. Troopers said that while there are no known witnesses, the other vehicle should have heavy front-end damage.

Sgt. Bill Lowe of the Missouri Highway Patrol asked the public to keep an eye out.

"Whether it went to a body shop, a wrecker lot or just parked in front of a house, if you had that kind of information, we'd be more than willing to look into it," he said.